diff --git a/intl/unicharutil/util/nsUnicodeProperties.cpp b/intl/unicharutil/util/nsUnicodeProperties.cpp
index 9aa5ef8e3ad7..2aeabf1eec07 100644
--- a/intl/unicharutil/util/nsUnicodeProperties.cpp
+++ b/intl/unicharutil/util/nsUnicodeProperties.cpp
@@ -295,11 +295,6 @@ GetTitlecaseForAll(uint32_t aCh)
     }
     return aCh;
 }
-
-bool IsEastAsianWidthFWH(uint32_t aCh)
-{
-    return GetCharProps2(aCh).mEastAsianWidthFWH;
-}
 #endif
 
 #define DEFINE_BMP_1PLANE_MAPPING_GET_FUNC(prefix_) \
diff --git a/intl/unicharutil/util/nsUnicodeProperties.h b/intl/unicharutil/util/nsUnicodeProperties.h
index ba5526a4da6b..95f928d77edd 100644
--- a/intl/unicharutil/util/nsUnicodeProperties.h
+++ b/intl/unicharutil/util/nsUnicodeProperties.h
@@ -156,22 +156,6 @@ GetTitlecaseForAll(uint32_t aCh) // maps both UC and LC to titlecase
   return u_totitle(aCh);
 }
 
-inline bool
-IsEastAsianWidthFWH(uint32_t aCh)
-{
-  switch (u_getIntPropertyValue(aCh, UCHAR_EAST_ASIAN_WIDTH)) {
-    case U_EA_FULLWIDTH:
-    case U_EA_WIDE:
-    case U_EA_HALFWIDTH:
-      return true;
-    case U_EA_AMBIGUOUS:
-    case U_EA_NARROW:
-    case U_EA_NEUTRAL:
-      return false;
-  }
-  return false;
-}
-
 #else // not ENABLE_INTL_API
 
 // Return whether the char has a mirrored-pair counterpart.
@@ -208,9 +192,6 @@ uint32_t GetLowercase(uint32_t aCh);
 uint32_t GetTitlecaseForLower(uint32_t aCh); // maps LC to titlecase, UC unchanged
 uint32_t GetTitlecaseForAll(uint32_t aCh); // maps both UC and LC to titlecase
 
-// Return whether the char has EastAsianWidth class F or W or H.
-bool IsEastAsianWidthFWH(uint32_t aCh);
-
 #endif // !ENABLE_INTL_API
 
 // returns the simplified Gen Category as defined in nsIUGenCategory